Precious stone



FIG. 1 is a top plan view of precious stone showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view thereof; the rear elevational viewbeing the same; and,

FIG. 4 is a right side elevational view thereof; the left sideelevational view being the same as the right side elevational view.

The ornamental design for precious stone, as shown and described.